Hybrid tea rose plant named KORtaltal

ABSTRACT

‘KORtaltal’ is a new and distinct variety of  Rosa hybrida  which is characterized by the combination of a compact and upright growth habit, dark green and glossy foliage, good resistance to common rose diseases, large yellow flowers with red petal margins, and flowers borne in small clusters. The new variety propagates successfully by stem cuttings and grafting and has shown to be uniform and stable in the resulting generations from asexual propagation.

Latin name of genus and species: The Latin name of the genus and speciesof the novel variety disclosed herein is Rosa hybrida.

Variety denomination The inventive variety of Rosa hybrida disclosedherein has been given the variety denomination ‘KORtaltal’.

BACKGROUND OF THE INVENTION

Parentage: The Rosa hybrida variety ‘KORtaltal’ is the result of acontrolled cross-pollination breeding program carried out by theinventor in Klein Offenseth-Sparrieshoop, Germany. The objective of thesaid breeding program was to create a new and distinct rose plant withunique qualities, such as:

-   -   1. Uniform growth and flowering; and    -   2. Abundant recurrent flowers; and    -   3. Attractive yellow and red-margined flowers; and    -   4. Attractive and abundant foliage; and    -   5. Resistance to diseases encountered in landscapes and gardens.

This combination of qualities is not present in prior rose cultivarsknown to the inventor. These objectives have been substantially achievedand in that distinguish ‘KORtaltal’ from all other varieties known tothe inventor.

‘KORtaltal’ is a seedling selection which resulted from the controlledpollination of Rosa hybrida ‘TANeiglat’ (not patented), the seed parent,and Rosa hybrida ‘KORquelda’ (U.S. Pat. No. 17,048), the pollen parent,during the summer of 2003. As part of a rose development program,Tim-Hermann Kordes germinated seeds from the aforementionedhybridization during the following winter and conducted evaluations andobservations on the resulting seedlings in a controlled environment inKlein Offenseth-Sparrieshoop, Germany. The resulting seedlings exhibiteddistinctive physical and biological characteristics. The new rose plantwas selected as a single plant in May of 2004 from the seedling beds dueto its superior characteristics and asexually propagated for furtherevaluation. This new and distinctive rose variety was given the name‘KORtaltal’.

Asexual Reproduction: The first asexual propagation of ‘KORtaltal’ wasperformed in July of 2004 at the inventor's nursery inOffenseth-Sparrieshoop, Germany. Subsequently, ‘KORtaltal’ has beensuccessfully propagated by stem cuttings and bud grafting in JacksonCounty, Oreg. These initial and other subsequent propagations conductedin controlled environments demonstrate that ‘KORtaltal’ reproduces trueto type in successive generations of asexual reproduction.

SUMMARY OF THE INVENTION

The following characteristics have been repeatedly observed andrepresent the distinguishing characteristics of the new Rosa hybridacultivar ‘KORtaltal’. These traits, in combination, distinguish‘KORtaltal’ as a new and distinct cultivar.

-   -   1. Rosa hybrida ‘KORtaltal’ exhibits a compact, upright growth        habit; and    -   2. Rosa hybrida ‘KORtaltal’ exhibits dark green and glossy        foliage; and    -   3. Rosa hybrida ‘KORtaltal’ exhibits good resistance to black        spot disease, Botrytis and powdery mildew; and    -   4. Rosa hybrida ‘KORtaltal’ exhibits flowers borne in small        clusters; and    -   5. Rosa hybrida ‘KORtaltal’ exhibits a large flower size for a        hybrid tea rose; and    -   7. Rosa hybrida ‘KORtaltal’ exhibits yellow flowers with red        petal margins.

BRIEF DESCRIPTION OF THE DRAWING

The accompanying color drawing shows as true as is reasonably possibleto obtain in color photographs of this type, the typical characteristicsof the buds, sepals, reproductive organs, flowers, leaves, prickles, andstems of ‘KORtaltal’, taken from twelve month old plants.

DETAILED BOTANICAL DESCRIPTION

The following is a detailed botanical description of a new and distinctvariety of Rosa hybrida known as ‘KORtaltal’, based upon observationsmade in August of 2015, from four year-old grafted plants grown outdoorsin Jackson County, Oreg. Those skilled in the art will appreciate thatcertain characteristics will vary with older or, conversely, withyounger plants. ‘KORtaltal’ has not been observed under all possibleenvironmental conditions. Where dimensions, sizes, colors and othercharacteristics are given, it is to be understood that suchcharacteristics are approximations or averages set forth as accuratelyas practicable. The phenotype of the variety may differ from thedescriptions set forth herein with variations in environmental, climaticand cultural conditions. Color notations are based on The RoyalHorticultural Society Colour Chart, The Royal Horticultural Society,London, 2001 edition except where common terms of color are used.

A botanical description of ‘KORtaltal’ and comparisons with othervarieties of Rosa hybrida are provided below.

-   General plant description:    -   -   Commercial classification.—Hybrid tea rose.        -   Growth rate.—Moderate.        -   Growth habit.—Compact and upright.        -   Mature dimensions.—100 cm tall and 70 cm wide, on average.        -   Cold hardiness.—Grown successfully in USDA Hardiness Zone 6.        -   Propagation.—Stem cuttings and bud grafting.        -   Disease resistance.—Good resistance to powdery mildew            (Sphaerotheca pannosa var. rosae), blackspot (Diplocarpon            rosae) and rust (Phragmidium mucronatum and P. tuberculatum)            diseases under normal growing conditions in Jackson County,            Oreg.-   Root system: Fibrous.-   Stems:    -   -   Stem color.—Young stems are Yellow-Green Group 147C; mature            stems are Yellow-Green Group 146C.        -   Anthocyanin intonations.—Greyed-Purple Group 184B            intonations are present on young stems.        -   Stem surface texture.—Both young and mature stems exhibit a            smooth texture.        -   Stem dimensions.—Typical mature stems are approximately 45            cm long and 4.5 to 7.0 mm in diameter.        -   Prickles.—Incidence — Present; 20 prickles per 10 cm of            stem, on average. Size — Highly variable, with the largest            prickles measuring 6 mm long and numerous small prickles            ranging in size from 1 to 3 mm long. Immature prickle color            — Greyed-Purple Group 185A. Mature prickle color —            Greyed-Brown Group 189B. Anthocyanin intonations — None            present. Shape — Larger prickles are concave and the smaller            prickles are linear.-   Leaves:    -   -   Arrangement.—Imparipinnate compound leaves; mature axillary            leaves consisting of 5 to 7 leaflets. It is common to see            leaves with both 5 and 7 leaflets.        -   Attachment.—Petiolate.        -   Dimensions.—150 mm long and 120 mm wide.        -   Abundance.—Average.        -   Stipules.—Size — 18 mm long and 5 mm wide. Stipule color —            Yellow-Green Group 147C. Anthocyanin intonations —            Greyed-Purple Group 184B. Anthocyanin intonations are strong            in the central zone of the adaxial surface and the marginal            zone of the abaxial surface. Stipitate glands — Abundant on            the abaxial surface and the margins. Margins — Abundant            stipitate glands. Texture, adaxial surfaces — Glabrous.            Texture, abaxial surfaces — Papillate. Apex — Apiculate.            Base — Winged.        -   Petiole.—Length — Average 30 mm. Diameter — Average 2 mm.            Petiole color, adaxial and abaxial surfaces — Yellow-Green            Group 145A. Margins — Entire with a limited number of            stipitate glands. Anthocyanin intonations — Greyed-Purple            Group 184B on stipitate glands, margins, adaxial surface of            the midrib and occasionally on the abaxial surface. Prickles            — Small prickles are occasionally present on the abaxial            surface. Stipitate glands — Abundant; present on the margins            and abaxial surface. Texture — Papillate. Strength — Strong.        -   Rachis.—Length — Average 22 mm. Diameter — Average 1.5 mm.            Color — Yellow-Green Group 145A. Anthocyanin intonations —            Greyed-Purple Group 184B on the adaxial surface, margins,            stipitate glands, and prickles; occasionally present on the            abaxial surface. Margins — Entire; limited number of            stipitate glands are present. Prickles — A few small            prickles on the abaxial surface. Stipitate glands — Limited            number present along margins and abaxial surface. Pubescence            — Abundant fine white hairs on the upper surface. Texture —            Papillate.        -   Leaflets.—Quantity — Leaves with both 5 and 7 leaflets are            regularly observed. Dimensions — Average size of the            terminal leaflet is 55 mm long and 40 mm wide. Shape —            Elliptic. Apex — Acuminate. Base — Obtuse. Margins —            Serrated; a slight undulation is occasionally present.            Luster and texture, adaxial surface — Semi-glossy and            smooth. Luster and texture, abaxial surface — Matte and            leathery. Juvenile foliage color, adaxial surface —            Yellow-Green Group 146A. Juvenile foliage color, abaxial            surface — Yellow-Green Group 146C. Mature foliage color,            adaxial surface — Yellow-Green Group 146A. Mature foliage            color, abaxial surface — Yellow-Green Group 146C.            Anthocyanin intonations — Greyed-Purple Group 185A is            present on the margins, midrib, and veins of the adaxial            surface and all of the abaxial surface. These intonations            are present in both juvenile and mature foliage; intonations            are stronger on juvenile foliage. Venation — Reticulate.            Petiolule — Dimensions — 5 mm long and 1 mm in diameter.            Petiolule color, adaxial surface — Greyed-Purple Group 184B.            Petiolule color, abaxial surface — Yellow-Green Group 145B.            Prickles — None present. Texture, adaxial and abaxial            surfaces — Smooth. Margins — Entire, with limited number of            stipitate glands.-   Inflorescence:    -   -   Inflorescence type.—Corymbs; occasionally flowers are            solitary. Flowers are held upright.        -   Blooming habit.—Recurrent; floriferous.        -   Quantity of flowers.—Generally three to five flower buds per            inflorescence.        -   Size.—25 cm tall and 9 cm wide, on average.        -   Peduncle.—Length — 15 to 25 mm average length. Diameter — 2            to 4 mm average diameter. Color — Yellow-Green Group 147A.            Anthocyanin intonations — Greyed-Purple Group 185B. Strength            — Strong. Texture — Smooth with stipitate glands. Pubescence            — Glabrous.-   Flowering laterals: Absent.-   Bud:    -   -   Bud form.—Short; globular.        -   Size.—Upon opening, 25 mm in length from base of receptacle            to distal end of bud and 20 mm diameter at its widest point.        -   Texture.—Smooth.        -   Color, as sepals first unfold.—Green-Yellow Group 1C at the            base, with margins that are a combination of Red Group 46B            to Red Group 46D.        -   Color when one-quarter open, inner side.—Marginal zone —            Yellow-Orange Group 14A, with intonations of Red Group 39A.            Middle zone — Yellow-Orange Group 20A. Basal zone —            Yellow-Orange Group 14B.        -   Color when one-quarter open, outer side.—Marginal zone —            Yellow-Orange Group 16C to 16D. Middle zone — Yellow-Orange            Group 15A. Basal zone — Yellow-Orange Group 16C to 16D;            margins are Red Group 46B.-   Flower:    -   -   Pedicels.—Surface — Glabrous with numerous stipitate glands.            Length — 16 to 30 mm, on average. Diameter — 2 to 4 mm, on            average. Color — Yellow-Green Group 146A. Anthocyanin            intonations — Greyed-Purple Group 185C. Strength — Strong.        -   Calyx.—General — Comprised of five polysepalous sepals, with            moderate foliaceous appendages present on three of the five            sepals. Diameter of calyx — 60 mm, at anthesis. Sepals —            Color, upper surface — Yellow-Green Group 146C with            intonations of Greyed-Purple 185D in the middle and on the            margin. Color, lower surface — Yellow-Green Group 146C with            intonations of Greyed-Purple 185B on margins. Size — 20 to            25 mm long and 8 mm wide, on average. Apex — Apiculate. Base            — Flat at union with receptacle. Quantity — Five. Upper            surface — Strongly pubescent. Lower surface — Coriaceous,            with an abundance of stipitate glands. Margins — With an            abundance of stipitate glands.        -   Corolla.—General shape of corolla — Cupped to open; shallow.            Shape of corolla when viewed from the side — Upon opening,            upper portion — Flat. Upon opening, lower portion —            Flattened convex. Open flower, upper portion — Flattened            convex. Open flower, lower portion — Concave. Dimensions —            Medium size for a hybrid tea rose. When open, the average            flower diameter is 80 mm and the average flower height is            15 mm. Fragrance — Moderate; classic rose fragrance with a            fruity scent. Duration — On the plant for 4 to 5 days; as a            cut flower, flowers will last 4 to 5 days. Senesced petals            drop away cleanly. Petals — Petal count — Exhibits double            flowers with an average of 30 petals under normal            conditions. Petal reflex — Petals are somewhat reflexed.            Timing of petal reflex — Simultaneous. Petal margin — Entire            to emarginate. Petal shape — Obovate. Apex — Obtuse. Base —            Obtuse. Dimensions — 40 mm long and 40 mm wide. Texture,            inner surface — Smooth. Texture, outer surface — Smooth.            Petal color, upon opening — Outermost petals, inner surface            — Marginal zone — Red Group 45C. Middle zone — Yellow Group            12C. Basal zone — Yellow Group 12B. Outermost petals, outer            surface — Marginal zone — Orange-Red Group 33C. Middle zone            — Yellow Group 12B to 12C, with intonations of Orange-Red            Group 33C. Basal zone — Yellow Group 12A. Innermost petals,            inner surface — Marginal zone — Yellow-Orange Group 15A.            Middle zone — Yellow-Orange Group 15A. Basal zone —            Yellow-Orange Group 15A. Innermost petals, outer surface —            Marginal zone — Yellow-Orange Group 15A. Middle zone —            Yellow-Orange Group 15A. Basal zone — Yellow-Orange Group            15A. Basal petal spots, upon opening — No distinct            coloration at the petal base. Petal color, after opening —            Outermost petals, inner surface — Marginal zone — Orange-Red            Group 32D and margined Orange-Red Group 32B. Middle zone —            Yellow Group 5C. Basal zone — Yellow Group 5A. Outermost            petals, outer surface — Marginal zone — Orange-Red Group 32D            and margined Orange-Red Group 32B. Middle zone —            Yellow-Orange Group 14C, with intonations of Orange Group            29D. Basal zone — Yellow-Orange Group 14B. Innermost petals,            inner surface — Marginal zone — Yellow Group 13B, with            slight intonations of Orange Group 29D. Middle zone — Yellow            Group 13B. Basal zone — Yellow Group 13B. Innermost petals,            outer surface — Marginal zone — Yellow-Orange Group 14C,            with slight intonations of Orange Group 29D. Middle zone —            Yellow-Orange Group 14D. Basal zone — Yellow Group 13B.            Basal petal spots, after opening — No distinct coloration at            the petal base. General Tonality — On open flower,            Yellow-Orange Group 14C. Not fading. Petaloids — Quantity —            4 petaloids per flower, on average. Dimensions —            Approximately 15 to 18 mm long and 5 to 7 mm wide. Color,            inner surface — Yellow Group 13B. Color, outer surface —            Yellow Group 13B. Margins — Indented. Shape — Varies from            spatulate to elliptical. Apex — Acute to obtuse. Base —            Attenuate to cuneate. Texture, inner and outer surfaces —            Smooth.-   Reproductive organs:    -   -   Stamens.—Quantity — Approximately 50, on average, and            regularly arranged around the styles. Anthers — Shape —            Reniform. Dimensions — 2 mm long and 1 mm wide, on average.            Color — Yellow-Orange Group 17C. Pollen — Abundant. Color is            Greyed-Orange Group 163B. Filaments — Color — Yellow-Orange            Group 17C. Length — 10 mm.        -   Pistils.—Quantity — Abundant; approximately 60. Stigmas —            Dimensions — 1 mm long and 1 mm wide. Location — Inferior in            position to anthers. Color — Greyed-Yellow Group 162B.            Styles — Length — Approximately 2.5 mm long. Color —            Yellow-Green Group 145D, with intonations of Red Group 36B            at the tip.        -   Ovary.—Dimensions — 8 mm long and 9 mm in diameter. Color —            Yellow-White Group 158C.        -   Receptacle.—Shape — Funnel-shaped; occasionally urn-shaped.            Dimensions — Approximately 10 mm high and 9 mm wide. Surface            texture and pubescence — Smooth, with a few stipitate glands            at the top. Color — Yellow-Green Group 146B. Texture —            Glabrous.-   Hips and seed formation:    -   -   Not observed to date.

COMPARISONS WITH THE PARENTS

The new rose plant may be distinguished from its seed parent, Rosahybrida ‘TANeiglat’, by the following combination of characteristics:

-   -   1. ‘KORtaltal’ exhibits yellow flowers with red petal margins,        whereas ‘TANeiglat’ exhibits cream-white flowers with red        margins.    -   2. ‘KORtaltal’ exhibits flowers borne in small clusters, whereas        ‘TANeiglat’ exhibits mostly solitary flowers.    -   3. ‘KORtaltal’ exhibits good disease resistance, whereas        ‘TANeiglat’ exhibits only average disease resistance.

The new rose plant may be distinguished from its pollen parent, Rosahybrida ‘KORquelda’, by the following combination of characteristics:

-   -   1. ‘KORtaltal’ exhibits a moderate rate of growth and compact        habit, whereas ‘KORquelda’ exhibits a tall plant height with a        vigorous rate of growth.    -   2. ‘KORtaltal’ exhibits shallow cup-shaped flowers, whereas        ‘KORquelda’ exhibits flowers with a flattened appearance.    -   3. ‘KORtaltal’ exhibits good disease resistance, whereas        ‘KORquelda’ exhibits very good disease resistance.

COMPARISON WITH THE MOST SIMILAR ROSA CULTIVAR KNOWN TO THE INVENTOR

For a comparison, several physical characteristics of the Rosa hybridavariety ‘KORamflusa’, a rose variety from the same inventor which isdescribed and illustrated in U.S. Plant Pat. No. 24,406, are compared to‘KORtaltal’ in Chart 1.

CHART 1 Characteristic ‘KORtaltal’ ‘KORamflusa’ General tonality of theYellow-Orange Group Yellow Group 13C and flower, at anthesis. 14C.Yellow-Orange Group 16A. Average diameter of 70 mm. 60 mm. the corolla,at anthesis. Inflorescence type. Corymb; small clusters Panicle with upto 10 of 3 to 5 flowers. flowers.

That which is claimed:
 1. A new and distinct variety of rose plant named‘KORtaltal’, as described and illustrated herein.